engUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-015551710.22059/ier.2001.3086830868Multicollinearity ReconsideredIn this paper we intend to improve the explanatory power of regressions when the deletion method is used for the remedy of Multicolinearity. If one deletes the variable (s) that is (are) responsible for Multicolinearity, he loses some information that is not common between the deleted variable (s) and the other remaining variables in the regression. To improve this method, we run the deleted variable (s) on the remaining variable (s) and use its residual as a new regressor in the main regression. Here we also focus on the Multicolinearity concept that is related to the population and samples separately. We will also show if one encounters with perfect Multicolinearity he can delete one of the variables without any biasedness costs. The procedure that saves some of the variables in the regression and input residuals of the other variable as regressors will give us ‘net effect regression’.http://ier.ut.ac.ir/article_30868_88cca389b18dde845ec1f7ac409a67f4.pdfengUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-0155172310.22059/ier.2001.3086930869Imperfect Markets and Commodity Prices Under Demand PullThis paper presents a theoretical view of imperfect market. It concludes that an increase in the price of products does not give any incentive to increasing production which shows the mechanism for upward trends in prices.http://ier.ut.ac.ir/article_30869_a82a00fba8a6b5838242f3425c81d2d5.pdfengUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-0155233210.22059/ier.2001.3087030870Spatial Patterns of Poverty in IranPoverty can have spatial dimensions. While general figures might show the spatial pattern of poverty, there is a need for more detailed examination of this pattern. Relying on simple figures of spatial patterns and ranking regions based on them might be misleading. This paper tries to apply spatial analysis methodsm, namely spatial autoregressive models to find out the impacts of space on the human poverty index (HPI). The results suggest that there is a significant spatial relationship between the HPI in the Iranian provinces. This means that the location of the provinces has some contributions to the differences of HPI in the country. However, the results show that space can partially explain the variations in poverty.http://ier.ut.ac.ir/article_30870_62ba02b294b224f1fadcefcd23da48c8.pdfengUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-0155335610.22059/ier.2001.3087130871The Islamic Economic Philosophyhttp://ier.ut.ac.ir/article_30871_340792916ab9e09c387705c47e42756b.pdfengUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-0155576110.22059/ier.2001.3087230872India's Technology PolicyIn this paper technology policy of India which has evolved over the years have been introduced as following: Firstly, it is selective and seeks to protect local technology. Secondly, it seeks to reduce to direct costs and individual costs of technology imports by regulating the royalty rates, other payments, the duration and restrictive clauses. Thirdly, it discourages technology imports through foreign direct investment except for complex technology industries. Lastly, it stresses on rapid absorption, and indigenisation and uptradation of the acquired and imported technology.http://ier.ut.ac.ir/article_30872_43737c4ff5d18d1b2157957e1634c76c.pdfengUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-0155618410.22059/ier.2001.3087330873The Gravity Model and Iran's Trade FlowsThis article has considered the volume and direction of Iran’s trade using the gravity model. The major issue in this analysis is to explore why Iran over or under-traded with the 76 countries relative to the predicted trade flows of the model. The study attempts to explore the reasons from the respect of both the model itself and Iran’s trade structure. This is done by analysing the performance, like most of the developing countries, lying in natural-resource-based manufactured goods (i.e., hydrocarbons and agricultural products), and labour-intensive products (i.e. textile fibre and carpet). Part of these products (primarily agricultural) face quantitive restrictions imposed by the industrial countries, such as EU countries. What adds to the problem is the existing competition with similar exported products (i.e., textile and carpet) between Iran and other developing countries. However, the advantage of a relatively adaptable labour force gives Iran an opportunity to exploit her labour-intensive products. Having this advantage in this domain does not remove the necessity for a greater effort in improving the quality of the labour force so as to enhance the quantity and quality of the products.http://ier.ut.ac.ir/article_30873_3eb1ed0e01577e9f04b93c66aa03aca8.pdfengUniversity of Tehran, Faculty of EconomicsIranian Economic Review1026-65421026-65422001-04-01558511110.22059/ier.2001.3087430874The Appropriate Exchange Rate System and the Regulation and Forecast of Exchange Rate for Iran's Economyhttp://ier.ut.ac.ir/article_30874_f7839ab9d57862611518b0ba4894425a.pdf